Prince Lightning 100 Tennis Racquet - Strung The Prince Lightning 100 is a tremendous value in an easy-to-swing, middleweight frame that suits recreational players or players transitioning from a junior to adult frame. Head Size: 100 sq. in. / 645.1 sq. cm. Length: 27 in / 68.6 cm Weight:(unstrung) 10.3 oz / 292g; (strung) 10.8 oz / 306 g String Pattern: 16 Mains x 19 Crosses - Racquet is strung and ready to use